1. Good quality. 2. Made of good - quality materials, it is durable and practical. 3. This filter can help maintain the cleaning performance of the vacuum cleaner and reduce the spread of dust, pollen, and other allergens into the surrounding air. 4. It is easy to install, and can be removed and replaced. 5. It is recommended to replace it every 2 - 3 months or according to usage to keep the machine performing well. 6. It is compatible with models K12, K13, and K12 Pro. 7. Color: Black and white color combination. 8. Material: Plastic. 9. Package contents: - 5 air filters with relatively high efficiency. - Only the above package contents are included, and no other products are provided. 10. Note: Light reflection and different displays may cause slight differences between the color of the item in the picture and the actual product. The allowable error range for the size is ±1 - 3 cm.